 this thing sticking up off of your roof, hence they made it flatter. And then they allowed you to put the shingles over it. So if you really, if you read the directions of it, it says stop the cut for the ridge vent 12 inches from the end of the roof. So from the end of the gable, you stop at the cut in the plywood at 12 inches, but you're technically supposed to run the ridge vent all the way out to the ends.